Primer Registro de Leños Fósiles de Moraceae y Rutaceae de la Formación (Plioceno-Pleistoceno), Toma Vieja, Paraná, Argentina

FRANCO, M. J.; BREA, M.

La Plata

Congreso; IV Congreso Argentino de Cuaternario y Geomorfología. XII Congresso da Associação Brasileira de Estudos do Quaternario. II Reunión sobre el Cuaternario de América del Sur.; 2009

Asociación Argentina de Cuaternario y Geomorfología. Associação Brasileira de Estudos do Quaternario.

AbPetrified woods of Pliocene-Pleistocene from fluvial sands of Ituzaingó Formation are described and assigned to Moraceae and Rutaceae families. The specimens were found in Toma Vieja fossiliferous locality, Paraná, Entre Ríos, Argentina. The fossil descriptions are based on four anatomically preserved stems. The presence of a combination of characters in each one allowed to distinguish these families of other dicotyledonous. The most related extant genera are Sorocea A. St. Hil. and Balfourodendron Corr. Méllo ex Oliv. The relationship and comparison with the nearest living relatives are discussed to determine their paleoecological and paleogeagraphical characteristics. The presence of these fossil woods suggests the existence of paleocommunity linked Seasonally Dry Tropical Forest (SDTF), which at present are relict in isolated locality of South America, but in the past were more widespread to the East and South in American continent.